JP7158055B2 - Welding automation system for dissimilar nuts for metal products for automobiles - Google Patents

Description

The present invention relates to a nut welding automation system that uses a robot to automatically weld different types of nuts to punched holes formed in a metal workpiece.

Automobiles generally consist of many parts, and such parts are assembled through an automated process. Automobile parts can be produced as final products and parts through pressing processes, welding processes, and the like. Automotive metal products to be welded have complex shapes, sharp corners, and weight due to their size. In addition, a large number of punched holes are formed in such metal workpieces, and different kinds of nuts, bolts, etc. are welded to each other.

The conventional welding process was a manual process in which workers were sent to transport metal workpieces, and the type and number of nuts were checked. However, such a work method entails the problem of safety accidents, the problem of defects due to operator error, and the problem of decreased productivity. In addition, the welding process should provide the same torque performance at the welded part and uniform welding quality, but there is a problem that this varies depending on the skill level of the operator.

Therefore, in the welding process, there is an urgent need for the development of a system for the automation process as well as the technical needs for equipment that can shorten the process time, reduce the cost, and improve productivity and product competitiveness. is the actual situation.

Korea Registered Patent No. 10-2052304 (Registered 2019.11.28.) Korean Patent No. 10-2018-0122981 (2018.11.14. Published) Korea Registered Patent No. 10-2015886 (2019.08.23. Registered)

The embodiments of the present invention have been devised to solve the above-mentioned problems, and are most suitable for automating the process of repeatedly welding different nuts to an automobile metal work having a complicated shape. The purpose is to introduce a variety of standardized elemental technologies to build an automated system for welding different kinds of nuts for metal products.

Another object of the present invention is to ensure reliability of quality by providing uniform current and pressure, which are main factors of welding, according to the nut in the welding process. Another object of the present invention is to prevent nut leakage and erroneous welding of other types of nuts. Through this, the defect rate of products can be reduced.

Another object is to secure the operational reliability of the welding process and improve the overall productivity. It also aims to reduce product costs and improve management profits.

Another object of the present invention is to reduce the occurrence of safety accidents due to worker mistakes by minimizing the input of workers. Another object of the present invention is to facilitate the connection between each component of the system and facilitate the maintenance of each component.

In order to solve the above problems, an embodiment of the present invention has a plurality of metal workpieces spaced apart in a line so that the metal workpieces are loaded at one end and the metal workpieces are unloaded at the other end. and a transferring jig part for intermittently transferring metal workpieces respectively placed on the fixing jig part from one side to the other side at the same time when unloading is detected. a shuttle machine; a welding machine for welding different types of nuts into a plurality of punched holes formed in a metal work; a nut supply unit for supplying different types of nuts to the welding machine; a drawer unit for moving said metal work piece to a drawing pad after checking for presence; after gripping said metal work piece with said automatic shuttle machine, moving it to said welding machine for metal processing such that the nut is welded; a robot for changing the position of the workpiece and dropping the metal workpiece into the drawer unit; and processing electrical signals transmitted from the automatic shuttle machine, the welding machine, the nut supply unit, the drawer unit and the robot. A control unit for generating a control signal; an automated system for dissimilar nut welding of metal workpieces.

The welding machine includes at least two welding units spaced apart, the welding units being controlled to provide different currents and applied forces, and supplying only a single type of nut to the welding units. Preferably, the supply units are connected one by one.

The fixing jig part includes a first vertical plate having a plurality of fastening holes repeatedly formed in the same pattern and having a sheet surface protruding at regular intervals so that a part of the metal workpiece is placed thereon. a fixing frame portion including; a jig portion coupled to the fixing frame portion through the fastening hole at a predetermined interval to mount the metal workpiece;

A first jig part, which is arranged at one end of the jig parts and into which the metal workpiece is initially loaded, is a bracket frame installed on one side of the first vertical plate; and is inserted inside the bracket frame. and an energization sensing part formed to have the same height as the seat surface and detecting the presence or absence of energization.

The jig unit includes an auxiliary frame that is coupled to the side surface of the first vertical plate to form an auxiliary seat surface for assisting placement of the metal workpiece; a spacing frame coupled to the side of the vertical plate; a front mounting frame coupled to the other end of the spacing frame for mounting the front surface of the metal workpiece; and a side of one end of the spacing frame through the same fastening hole as the spacing frame. a rear mounting frame coupled with said first vertical plate for mounting the rear surface of the metal workpiece.

The transfer jig part includes a transfer frame portion; a transfer jig unit coupled to the transfer frame portion and arranged inside the fixing jig part for mounting a metal workpiece to be transferred; Preferably, it includes an elevating section that provides vertical movement; and a horizontal movement section that provides fore and aft horizontal movement to said transfer frame section.

The transfer jig unit includes a fixed bracket portion coupled to the transfer frame portion; a transfer sheet coupled to the fixed bracket portion and projecting at regular intervals so that a portion of the metal workpiece to be transferred is placed thereon; It is preferable to include a second vertical plate having a surface formed thereon; and a transfer jig unit coupled to the second vertical plate at regular intervals to temporarily mount the metal workpiece to be transferred.

When the unloading of the transfer jig part is detected, 1) the transfer jig unit lifts the metal workpiece placed on the fixing jig part while being moved upward by the elevating part, and 2) the transfer. When the jig unit is moved from one side to the other by a predetermined distance by the horizontal movement part, 3) the transfer jig unit moves downward by the elevating part to the transfer jig unit. It is preferable to place each mounted metal work piece into the immediately following fixture part.

The drawer unit is a body frame portion formed by connecting a plurality of angles arranged in vertical, horizontal and inclined directions; It is preferable to include a slope rod arranged to be inclined so as to slide; and sidewalls arranged on both sides of the body frame portion to prevent the metal work piece from coming off.

The drawer unit includes a first sensor unit disposed on the rear surface of the body frame portion and inspecting whether or not the nut is normally welded to the position of the punched hole set in advance in the metal workpiece; It is preferable to further include a second sensor unit disposed on the body frame portion and detecting a metal workpiece slid through the slope rod.

According to the problem-solving means of the present invention, which has been examined in detail above, various effects including the following items can be expected. However, the present invention does not come into existence unless all the following effects are exhibited.

A system for automating the welding of different nuts for metal products according to an embodiment of the present invention includes various elements optimized for automation in the process of repeatedly welding different nuts to metal products for automobiles having complex shapes. Technology can be introduced.

Also, in the welding process, it is possible to uniformly provide current and pressure, which are main factors of welding, according to the nut, thereby ensuring quality reliability. Also, nut leakage and erroneous welding of other types of nuts can be prevented. Through this, the defect rate of products can be reduced. In addition, operational reliability of the welding process can be ensured, and overall productivity can be improved. In addition, it is possible to reduce product costs and improve business profits. In addition, by minimizing the input of workers, it is possible to reduce the occurrence of safety accidents due to worker mistakes.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of an automated system for welding dissimilar nuts for metal workpieces according to an embodiment; Figure 2 is a perspective view of the automatic shuttle machine of Figure 1; 3 is an enlarged view of part A of FIG. 2; FIG. FIG. 2 is a schematic diagram illustrating the operation of the automatic shuttle machine of FIG. 1; Figure 2 is a drawing of the welding machine of Figure 1; FIG. 2 is a drawing of the nut supply unit of FIG. 1; FIG. Figure 2 is a perspective view of the drawer unit of Figure 1; FIG. 8 is a perspective view of FIG. 7 viewed in a different direction; 1 is a schematic block diagram of the system; FIG.

In the following description of the present invention, if it is determined that related well-known functions are obvious to a person skilled in the art and may unnecessarily obscure the gist of the present invention, they will be omitted. Detailed description is omitted. The terminology used in this application is merely used to describe particular embodiments and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as "including" or "having" are intended to specify the presence of any feature, number, step, act, component, part, or combination thereof described in the specification. without precluding the possibility of the presence or addition of one or more other features, figures, steps, acts, components, parts or combinations thereof. .

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of an automated system for welding dissimilar nuts for metal workpieces according to an embodiment, FIG. 2 is a perspective view of the automatic shuttle machine of FIG. 1, and FIG. 3 is an enlarged view of part A of FIG. and FIG. 4 is a schematic diagram showing the operation of the automatic shuttle machine of FIG. 5 is a drawing of the welding machine of FIG. 1, and FIG. 6 is a drawing of the nut supply unit of FIG. 7 is a perspective view of the drawer unit of FIG. 1, FIG. 8 is a perspective view of FIG. 7 from a different direction, and FIG. 9 is a schematic block diagram of the system.

1 to 9, an automated system for welding different types of nuts for metal workpieces according to an embodiment of the present invention includes an automatic shuttle machine 1000, a welding machine 200, a nut supply unit 300, a drawer unit 400, a robot 500, a control It may include a unit 600, a safety fence section 700, a server section 800, a local network section (not shown), and the like. The automated system may be installed within a specific installation area such as a factory. This system can shorten the distance between work processes by arranging each component so as to be dense, which can improve the takt time. On the other hand, automated processes through the system can be summarized in categories such as loading process, transfer process, welding process, inspection process, and withdrawal process. In addition, this system can prevent industrial accidents through worker safety management in automated processes.

The automatic shuttle machine 1000 includes a fixture part 1100 in which a plurality of metal workpieces T are spaced apart in a line such that the metal workpieces T are loaded at one end and the metal workpieces T are unloaded at the other end. , and a transfer jig part 1200 for intermittently transferring the metal workpieces T respectively placed on the fixing jig part 1100 from one side to the other side at the same time when unloading is detected. Here, the metal workpiece T can be an (electric) automobile part. The metal work T can be an intermediate part or a product having a defined shape and size formed through, for example, stamping a metal sheet. A plurality of punched holes may be formed in such a metal workpiece T. As shown in FIG.

The automatic shuttle machine 1000 is configured such that the metal workpieces T loaded at one end are sequentially transferred to the other end and gripped by the robot 500 and then unloaded by the automatic shuttle machine 1000 . For this purpose, the automatic shuttle machine 1000 includes a fixture part 1100 and a transfer fixture part 1200 . Also, the automatic shuttle machine 1000 may include a configuration for sensing loading and unloading respectively.

The fixing jig part 1100 means a fixing part in which an operation such as driving does not occur while the metal workpiece T is being transferred. A fixing jig part 1100 is formed by combining a plurality of plates or frames, and the lower side is fixed to the ground. As such, the fixture part 1100 includes a first vertical plate 1120 arranged vertically on the ground. Two first vertical plates 1120 are arranged to face each other to support both ends of the metal workpiece T, respectively.

A plurality of fastening holes 1121 may be repeatedly formed in the same pattern in the first vertical plate 1120 . The fastening holes 1121 may have various sizes and are formed through the side of the first vertical plate 1120 . In addition, the first vertical plate 1120 may have a sheet surface 1122 protruding at regular intervals so that a portion of the metal workpiece T may be placed thereon. The seat surface is a flat surface, and a shock absorbing pad for preventing noise and vibration may be formed on the surface. The seat surface 1122 can be formed in multiple stages depending on the shape of the metal workpiece T. As shown in FIG.

The jig part 1130 is connected to the fixing frame part 1110 at regular intervals through the fastening holes 1121 and serves to mount the metal workpiece T thereon. Such a jig portion 1130 mounts both end portions of the metal workpiece T, respectively. The jig part 1130 may be coupled to the fixed frame part 1110 through the fastening holes 1121 . Meanwhile, the first jig portion, which is disposed at one end of the jig portion 1130 and into which the metal workpiece T is initially loaded, may further include a sensing portion. Specifically, the first jig part can detect whether or not the metal workpiece T is loaded by means of the electricity detection part 1142 arranged through the bracket frame 1141 . The bracket frame 1141 may include, for example, a body into which the power sensing part 1142 is inserted and a coupling part extending from the body to couple the bracket frame 1141 to the first vertical plate 1120 . As a result, the bracket frame 1141 may be installed on one side of the first vertical plate 1120 . Here, the installation method may be screw connection through the fastening hole 1121 described above.

The power sensing part 1142 is inserted inside the bracket frame 1141 and is formed to have the same height as the seat surface 1122 to detect the presence or absence of power. This is due to the metallic properties of the metal workpiece T. The energization sensing part 1142 may contact the metal workpiece T through the sensing surface exposed to the outside of the bracket frame 1141 . The current detection parts 1142 are arranged in the first jig part and can be in contact with one end and the other end of the metal workpiece T, respectively. The power detection unit 1142 can confirm whether the metal workpiece T is normally loaded on the first jig unit. Meanwhile, the power detection unit 1142 may generate a normal signal regarding whether or not loading is present and transmit it to the control unit 600 .

Alternatively, the n-th jig portion disposed at the other end of the jig portion 1130 to which the metal workpiece T is unloaded may further include a sensing portion. Here, the sensing part may have the same structure as the power sensing part 1142 arranged through the bracket frame 1141 of the first jig part. At this time, the power sensing unit 1142 can detect whether or not the metal workpiece T is unloaded. Since the bracket frame 1141 and the energization sensing part 1142 are as described above, a detailed description thereof will be omitted. The power detection unit 1142 can confirm whether the metal workpiece T is normally unloaded to the nth jig. Meanwhile, the power sensing unit 1142 may generate a normal signal indicating whether unloading occurs and transmit it to the control unit 600 .

In addition, the jig part 1130 further includes an auxiliary frame 1131, a separation frame 1132, a front mounting frame 1133, a rear mounting frame 1134, a rear auxiliary mounting frame 1135, an outer mounting frame 1136, a fixing pin frame (not shown), and the like. can be done. The auxiliary frame 1131 is formed with an auxiliary seat surface 1138 that is coupled to the side surface of the first vertical plate 1120 to assist in placing the metal workpiece T thereon. At this time, the auxiliary seat surface 1138 may be formed to have the same height as the seat surface 1122 . Auxiliary seating surface 1138 may be formed at a fixed distance from seating surface 1122 . The spacing frame 1132 has a “U” shape and one end is coupled to the side of the first vertical plate 1120 . The spacing frame 1132 allows the front mounting frame 1133 and the rear auxiliary mounting frame 1135 to be spaced apart from the first vertical plate 1120 through a bent frame.

The front mounting frame 1133 is coupled to the other end of the separation frame 1132 and mounts the front surface of the metal workpiece T. The rear mounting frame 1134 is coupled to the first vertical plate 1120 through the same fastening hole 1121 as the separation frame 1132 at one end side of the separation frame 1132, and mounts the rear surface of the metal workpiece T thereon. At this time, the front mounting frame 1133 and the rear mounting frame 1134 are formed with the same thickness. On the other hand, it is preferable that the distance between the front mounting frame 1133 and the rear mounting frame 1134 is set larger than the distance between the front and rear surfaces of the metal workpiece T.

Also, the rear auxiliary mounting frame 1135 is coupled to the other side of the separation frame 1132 and arranged to face the front mounting frame 1133 . The rear surface auxiliary mounting frame 1135 auxiliary mounts the rear surface of the metal workpiece T to make mounting of the metal workpiece T more stable. The distance between the front mounting frame 1133 and the rear mounting frame 1134 is preferably set smaller than the distance between the front mounting frame 1133 and the rear auxiliary mounting frame 1135 .

The outer surface mounting frame 1136 is coupled to the outer surface of the first vertical plate 1120 to mount both ends of the metal workpiece T. The fixed pin frame restricts the position of the metal workpiece T mounted on the side of the first vertical plate 1120 . The fixing pin frame can fix the position of the metal workpiece T by inserting the fixing pins protruded into the position limiting holes formed in the metal workpiece T. As shown in FIG.

When unloading is detected, the transfer jig part 1200 intermittently transfers the metal workpieces T respectively arranged on the fixing jig part 1100 from one side to the other side at the same time. Specifically, the transfer jig part 1200 may include a transfer frame part 1210 , a transfer jig unit 1220 , an elevating part 1230 and a horizontal moving part 1240 . The transfer frame part 1210 is formed by combining a plurality of frames, and is a part that is transferred vertically and horizontally. The transfer jig unit 1220 is coupled to the transfer frame part 1210 and placed inside the fixing jig part 1100 to load the metal workpiece T to be transferred.

Specifically, the transfer jig unit 1220 may include a fixed bracket portion 1221, a second vertical plate 1222, a transfer jig portion 1223, and the like. The fixed bracket portion 1221 is coupled to the transfer frame portion 1210 . A second vertical plate 1222 is coupled to the fixed bracket portion 1221 . A plurality of fastening holes may be repeatedly formed in the same pattern in the second vertical plate 1222 . The second vertical plate 1222 may be formed with transfer sheet surfaces 1224 that protrude at regular intervals so that a portion of the metal workpiece T to be transferred is placed thereon. The transfer jig part 1223 is coupled to the second vertical plate 1222 at regular intervals to temporarily mount the metal workpiece T to be transferred.

The lifting part 1230 is coupled to the transfer frame part 1210 and provides vertical movement of the transfer jig unit 1220 through the first driving part. The horizontal movement part 1240 is coupled to the transfer frame part 1210 and provides forward and backward horizontal movement to the transfer jig unit 1220 through the second driving part. The first driving section and the second driving section include well-known driving elements such as motors, driving cylinders, speed reducers, etc., and detailed description thereof will be omitted.

When the unloading of the transfer jig part 1200 is detected, 1) the transfer jig unit 1220 lifts the metal workpiece T placed on the fixing jig part 1100 while being moved upward by the elevating part 1230, and 2). When the transfer jig unit 1220 is moved from one side to the other by a predetermined distance by the horizontal movement part 1240, 3) the transfer jig unit 1220 is moved downward by the elevating part 1230, and the transfer jig unit 1220 moves downward. The metal workpieces T mounted on 1220 are placed on the immediately following fixture parts 1100, respectively. At this time, the transfer jig unit 1220 is released from contact with the metal workpiece T and positioned below the metal workpiece T, so that no interference occurs. After that, the transfer jig unit 1220 is moved from the other side to one side by the horizontal moving part 1240 to return to the initial position.

The welding machine 200 is a device that automatically welds a fastening member such as a nut to the metal workpiece T. As shown in FIG. Welding machine 200 welds a different type of nut to a plurality of punched holes formed in metal workpiece T. As shown in FIG. Two types of nuts can be welded into the punched holes according to one embodiment. As described above, since the nut is welded to the metal processed product T, it can be fixed to the body of an automobile or connected to other parts. Welding machine 200 may be, for example, a device that performs electric resistance welding. The welding machine 200 can perform an optimum welding process by constantly controlling the current and pressure according to the type of nut. Through this, the welding machine 200 can provide torque performance required for each nut according to the type of nut.

The welding machine 200 according to one embodiment may include at least two or more welding units 210 spaced apart to perform welding on different types of nuts (eg, M6, M8, etc.). The welding unit 210 may include a lower electrode part 212 and a vertically movable upper electrode part 211 . At this time, the lower surface of the metal workpiece T is supported by the lower electrode portion 212 . At this time, the nut is placed on the upper surface of the metal workpiece T through the nut placing mechanism 213 . Then, the upper electrode part 211 descends and performs welding at the point where the nut contacts the metal workpiece T. As shown in FIG.

Each welding unit 210 can be controlled to provide a different current and applied force. That is, different welding units 210 are used according to the types of nuts. Two welding units 210 are arranged in the welding machine 200 according to one embodiment. On the other hand, the welding unit 210 can measure current and pressure signals during the welding process and transmit them to the control unit 600 . The control unit 600 can primarily count the total number of nuts welded to one metal workpiece T, that is, the number of welding points.

On the other hand, each welding unit 210 is connected with one nut supply unit 300 for supplying only one type of nut. As a result, the nut supply unit 300 can supply the welding machine 200 with different types of nuts. The nut supply unit 300 guides the nuts to the inner peripheral surface of the hopper 310 by centrifugal force and discharges them in a line. At this time, the nut supply unit 300 generates vibration to enable the nut to move more smoothly. The hopper 310 has an open upper side, and is a portion for loading and storing nuts. A nut guide part 320 is connected to one end of a hopper 310 of the nut supply unit 300 . The nut may wait in the nut guide portion 320 while the welding process is in progress on the welding machine 200 . A transfer nozzle 330 is connected to the end of the nut guide part 320 . The nut is transferred from the nut guide part 320 to the welding machine 200 (particularly, the nut placing mechanism 213) through the transfer nozzle 330. FIG. The transfer nozzle 330 has the shape of a hose with an open interior.

The drawer unit 400 checks whether the number of nuts welded to the metal work T is normal, and then moves the metal work T to the drawer pad 440 . The drawer unit 400 can sense a nut at a specific location on the metal workpiece T using a plurality of proximity sensors. Specifically, the drawer unit 400 may include a body frame portion 410, a slope rod 420, sidewalls 430, a first sensor portion 450, a second sensor portion 460, and the like.

The body frame part 410 is formed by connecting a plurality of angles arranged in vertical, horizontal and inclined directions. The body frame part 410 is fixedly installed on the ground. The slope rod 420 is arranged on the upper side of the body frame part 410 and inclined so that the falling metal workpiece T slides toward the drawing pad 440 side. The slope rods 420 may, for example, be configured in pairs spaced apart and opposed to each other. On the other hand, the sidewalls 430 are arranged on both sides of the body frame part 410 to prevent the metal workpiece T from coming off.

The drawer pad 440 is installed on the body frame portion 410 . The drawing pad 440 is a portion from which the metal workpiece T, which has been inspected by the drawing unit 400, is drawn out. Since the drawing pad 440 includes an elastic material, it can absorb the impact applied to the metal workpiece T to be slid.

The first sensor part 450 is arranged on the rear surface of the body frame part 410 to check whether the nut is normally welded to the preset punched hole position of the metal workpiece T. As shown in FIG. The first sensor unit 450 may consist of a plurality of proximity sensors. Here, one proximity sensor is preferably used for each nut. That is, the number of proximity sensors is the same as the total number of nuts welded to the metal workpiece T. A proximity sensor can sense if the nut is within a certain distance. The proximity sensor is placed on the body frame portion 410 in consideration of the position of the nut welded to the metal work T. As shown in FIG.

After measuring the actual number of nuts welded to the metal workpiece T, the first sensor unit 450 may transmit the measured number to the control unit 600 . Therefore, the system can double check by comparing the number of hit points and the number of nuts welded to the actual metal work T with each other.

The second sensor part 460 is installed on the body frame part 410 facing upward to detect the metal workpiece T sliding through the slope rod 420 . The second sensor unit 460 can count the number of metal workpieces T for which the welding process has been completed. On the other hand, the second sensor unit 460 can also double-check by comparing the number of metal workpieces T measured by the welding machine 200 and the actual number of metal workpieces T drawn out through the drawing unit 400 .

After gripping the metal workpiece T with the automatic shuttle machine 1000, the robot 500 moves the metal workpiece T to the welding machine 200 to change the position of the metal workpiece T multiple times so that the nut is welded. Let it drop to 400. Such a robot 500 can be driven by a control unit 600 and a preset algorithm. The robot 500 is multi-axially rotated by connecting a plurality of link portions. The robot 500 may use a driving motor for each rotation axis to improve the degree of freedom of work due to multi-axis rotation. The robot 500 can freely change the position of the metal workpiece T in a three-dimensional space through bending ability, direction changing ability, etc. of the joints.

The robot 500 can grip the metal workpiece T through a grip part formed at the end of the arm. The robot 500 moves the position of the metal workpiece T so that the punched hole of the metal workpiece T is positioned accurately in the lower electrode portion 212 . When the welding of one nut is completed, the robot 500 changes the position of the metal workpiece T for the welding process of the next nut. When the welding unit 210 on one side completes the welding of one type of nut, the robot 500 according to an embodiment moves to the welding unit 210 on the other side to weld another type of nut.

The control unit 600 processes electrical signals transmitted from the automatic shuttle machine 1000, the welding machine 200, the nut supply unit 300, the drawer unit 400 and the robot 500 to generate control signals. On the other hand, the control unit 600 can send control signals to each component of the system to control them individually. Such a control unit 600 may be included within the server section 800 . Meanwhile, the server unit 800 may further include a database, a wireless transmission/reception unit, and the like.

The control unit 600 may, for example, receive electrical signals measured by the first sensor unit 450 and generate corresponding control signals. In addition, the control unit 600 can process data transmitted from each component and control the system in an integrated manner. As a result, failures, accidents, and other errors in any one of the components can cause the system to cease operation entirely. For example, when the number of nuts measured through the first sensor part 450 of the drawer unit 400 does not match the number of hit points, the system may be temporarily stopped. Also, each component of the system is electrically connected to each other.

The short-distance network unit serves to transmit electrical signals and data between each component of the system as well as between the smart phone of the worker and the smart phone of the manager. On the other hand, a dedicated application can be installed on each of the worker's smartphone and the administrator's smartphone. Through this, the server unit 800 can wirelessly communicate with the smart phone of the worker and the smart phone of the manager based on, for example, Bluetooth (registered trademark) through the wireless transmitter/receiver. By running the dedicated application, it is possible to check worker information, work schedule, work status, organization of work groups, information on safety rules, etc. Based on the location information, it is automatically recognized that the operator is located near the specific installation area of this system. On the other hand, the worker can transmit a message regarding the completion of the work upon confirmation by the manager when the work quantity assigned to the worker is completed according to the work schedule.

In addition, the safety fence part 700 is formed to surround the installation area where the system is installed. Safety fence section 700 includes a safety door to allow workers to enter and exit the installation area. Meanwhile, the safety door is provided with a third sensor unit 710 for detecting whether or not the safety door is locked, and the third sensor unit 710 can transmit a measurement signal to the control unit 600 . For example, the system can be temporarily stopped by the control unit 600 when a safety door is opened.

While preferred embodiments of the invention have been illustratively described above, the scope of the invention should not be limited only to such specific embodiments, but rather within the scope of the appended claims. It is changeable.

Claims (8)

a fixture part in which a plurality of metal workpieces are spaced in a row such that one end is loaded with the metal workpieces and the other end is unloaded with the metal workpieces; An automatic shuttle machine including a transfer jig part for intermittently transferring metal workpieces respectively placed in the fixing jig part from one side to the other side at the same time;
A welding machine that welds dissimilar nuts to a plurality of punched holes formed in a metal workpiece;
a nut supply unit that supplies dissimilar nuts to the welding machine;
a drawer unit for moving the metal work to a drawer pad after checking whether the number of nuts welded to the metal work is normal;
A robot that grips a metal work piece with said automatic shuttle machine, then moves it to said welding machine, repositions the metal work piece so that the nut is welded, and drops the metal work piece into a drawer unit; and a control unit for processing electrical signals transmitted from the shuttle machine, the welding machine, the nut supply unit, the drawer unit and the robot to generate a control signal ;
The fixture part is
A fixed frame part including a first vertical plate having a plurality of fastening holes repeatedly formed in the same pattern and having a seat surface protruding at regular intervals so that a part of the metal workpiece is placed thereon;
a jig unit that is coupled to the fixed frame unit at regular intervals through the fastening holes and on which the metal workpiece is mounted;
The jig part
an auxiliary frame coupled to the side surface of the first vertical plate to form an auxiliary seat surface for assisting placement of the metal workpiece;
a spacing frame having a "U" shape, one end of which is coupled to the side surface of the first vertical plate;
a front mounting frame coupled to the other end of the isolation frame for mounting the front surface of the metal work; and
a rear surface mounting frame that is coupled to the first vertical plate through the same fastening hole as that of the separation frame on a side surface of one end of the separation frame to mount the rear surface of the metal workpiece;
An automated system for welding different kinds of nuts for metal processed products , characterized by : The welding machine includes at least two spaced apart welding units,
The welding units of claim 1, wherein the welding units are controlled to provide different currents and pressures, and each of the welding units is connected to a nut supply unit that supplies a single type of nut. Automated welding system for dissimilar nuts for metal products. A first jig part, which is disposed at one end of the jig parts and into which the metal workpiece is first loaded, is a bracket frame installed on one side of the first vertical plate; and inserted inside the bracket frame. , and an energization sensing part formed to have the same height as the seat surface and detecting the presence or absence of energization. The transfer jig part is
transfer frame section;
a transfer jig unit that is coupled to the transfer frame portion and placed inside the fixing jig part for mounting a metal workpiece to be transferred;
2. The automated system for welding dissimilar nuts of metal workpieces according to claim 1, comprising: an elevating part that provides up and down vertical motion to said transfer frame part; and a horizontal movement part that provides back and forth horizontal motion to said transfer frame part. . The transfer jig unit includes a fixed bracket part coupled to the transfer frame part;
a second vertical plate coupled to the fixed bracket part and formed with a transfer sheet surface protruding at regular intervals so that a part of the metal workpiece to be transferred is placed thereon;
5. The automatic dissimilar nut welding system for metal workpieces according to claim 4 , further comprising: a transfer jig part that is connected to the second vertical plate at regular intervals and temporarily mounts the metal workpieces to be transferred. When the unloading of the transfer jig part is detected, 1) the transfer jig unit lifts the metal workpiece placed on the fixing jig part while being moved upward by the elevating unit; When the jig unit is moved from one side to the other by a predetermined distance by the horizontal movement part, 3) the transfer jig unit moves downward by the elevating part to the transfer jig unit. 6. The automated system for welding dissimilar nuts of metal workpieces according to claim 5 , wherein the mounted metal workpieces are respectively placed in the immediately following fixture parts. a body frame part formed by combining a plurality of angles arranged in vertical, horizontal and inclined directions;
a slope rod arranged on the upper side of the body frame portion and inclined so that the falling metal work piece slides toward the drawer pad; and The automated dissimilar nut welding system for metal workpieces according to claim 1, comprising: a sidewall that prevents disengagement. The drawer unit has a first sensor unit disposed on the rear surface of the body frame portion for inspecting whether or not the nut is normally welded to the position of the punched hole set in advance in the metal workpiece; and facing upward to the body. 8. The system for automating dissimilar nut welding of metal workpieces according to claim 7 , further comprising: a second sensor unit arranged on the frame part and detecting a metal workpiece sliding through the slope rod.

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